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Math Help - Hypothesis, Drawing T-Distribution

  1. #1
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    Hypothesis, Drawing T-Distribution

    Same 1,

    Let me give the figures.

    H1:Mu<50, a simple random sample of size n=24 is obtained from a population that is known to be normally distributed.

    If X(same mea)=47.1 and s=10.3.

    B, If the researcher decides to test this hypothesis at the alpha+.05 level of signifacance, determine the critical value.

    C- Draw a t-distribution.

    A)=t0,-1.379
    B=-t.005=-1.714

    This is shaded with the left tail.

    (-1.379>-1.714)


    Part, it's basically self explanatory.. This gets shaded to the right, but why? The t0 was greater than t.010. It was -1.310>-t.10=1.383... It states decreases,isn't less than anything in those terms, shaded to the left?
    Attached Thumbnails Attached Thumbnails Hypothesis, Drawing T-Distribution-6487.jpg  
    Last edited by Past45; April 20th 2013 at 10:17 PM.
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  2. #2
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    Re: Hypothesis, Drawing T-Distribution

    Just to add, it's meant to be Classical Method, not PValue.
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  3. #3
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    Re: Hypothesis, Drawing T-Distribution

    Essential I just want to know why is the hypothesis test here being shaded to the right when it clearly states she wants to "decrease wait time". Which will mean it is less than, right? So why is it a right tailed here for this?
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